Changeset 32814

Timestamp:

06/17/2015 01:52:46 AM (9 years ago)

Author:

boonebgorges

Message:

Split all shared taxonomy terms on upgrade to 4.3.

Dear Shared Terms, Welcome to Splitsville. Population: You.

See #30261.

Location:

trunk/src

Files:

• wp-admin/includes/upgrade.php (modified) (3 diffs)
• wp-includes/version.php (modified) (1 diff)

trunk/src/wp-admin/includes/upgrade.php

@@ -535 +535 @@
     // upgrade_420() to catch bad comments prior to any auto-expansion of
     // MySQL column widths.
-    if ( $wp_current_db_version < 32364 )
+    if ( $wp_current_db_version < 32814 )
         upgrade_430();
 
@@ -1560 +1560 @@
         }
     }
+
+    if ( $wp_current_db_version < 32814 ) {
+        split_all_shared_terms();
+    }
 }
 
@@ -1849 +1853 @@
 
     return $wpdb->query( "ALTER TABLE $table CONVERT TO CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci" );
+}
+
+/**
+ * Split all shared taxonomy terms.
+ *
+ * @since 4.3.0
+ */
+function split_all_shared_terms() {
+    global $wpdb;
+
+    // Get a list of shared terms (those with more than one associated row in term_taxonomy).
+    $shared_terms = $wpdb->get_results(
+        "SELECT tt.term_id, t.*, count(*) as term_tt_count FROM {$wpdb->term_taxonomy} tt
+         LEFT JOIN {$wpdb->terms} t ON t.term_id = tt.term_id
+         GROUP BY t.term_id
+         HAVING term_tt_count > 1"
+    );
+
+    // Rekey shared term array for faster lookups.
+    $_shared_terms = array();
+    foreach ( $shared_terms as $shared_term ) {
+        $term_id = intval( $shared_term->term_id );
+        $_shared_terms[ $term_id ] = $shared_term;
+    }
+    $shared_terms = $_shared_terms;
+
+    // Get term taxonomy data for all shared terms.
+    $shared_term_ids = implode( ',', array_keys( $shared_terms ) );
+    $shared_tts = $wpdb->get_results( "SELECT * FROM {$wpdb->term_taxonomy} WHERE `term_id` IN ({$shared_term_ids})" );
+
+    // Split term data recording is slow, so we do it just once, outside the loop.
+    $suspend = wp_suspend_cache_invalidation( true );
+    $split_term_data = get_option( '_split_terms', array() );
+    $skipped_first_term = $taxonomies = array();
+    foreach ( $shared_tts as $shared_tt ) {
+        $term_id = intval( $shared_tt->term_id );
+
+        // Don't split the first tt belonging to a given term_id.
+        if ( ! isset( $skipped_first_term[ $term_id ] ) ) {
+            $skipped_first_term[ $term_id ] = 1;
+            continue;
+        }
+
+        if ( ! isset( $split_term_data[ $term_id ] ) ) {
+            $split_term_data[ $term_id ] = array();
+        }
+
+        // Keep track of taxonomies whose hierarchies need flushing.
+        if ( ! isset( $taxonomies[ $shared_tt->taxonomy ] ) ) {
+            $taxonomies[ $shared_tt->taxonomy ] = 1;
+        }
+
+        // Split the term.
+        $split_term_data[ $term_id ][ $shared_tt->taxonomy ] = _split_shared_term( $shared_terms[ $term_id ], $shared_tt, false );
+    }
+
+    // Rebuild the cached hierarchy for each affected taxonomy.
+    foreach ( array_keys( $taxonomies ) as $tax ) {
+        delete_option( "{$tax}_children" );
+        _get_term_hierarchy( $tax );
+    }
+
+    wp_suspend_cache_invalidation( $suspend );
+    update_option( '_split_terms', $split_term_data );
 }
 

trunk/src/wp-includes/version.php

@@ -12 +12 @@
  * @global int $wp_db_version
  */
-$wp_db_version = 32453;
+$wp_db_version = 32814;
 
 /**